linux-kernel - RE: [PATCH] Documentation/changes: Raise minimum supported binutils version to 2.23

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Message-ID: <23ed7ec83ff147d7bfd905d9dab27648@AcuMS.aculab.com>
Date:   Wed, 25 Mar 2020 17:33:18 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     "'Jason A. Donenfeld'" <Jason@...c4.com>,
        Kees Cook <keescook@...omium.org>
CC:     Borislav Petkov <bp@...en8.de>,
        Arvind Sankar <nivedita@...m.mit.edu>,
        "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Ingo Molnar" <mingo@...hat.com>, X86 ML <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Thomas Lendacky <Thomas.Lendacky@....com>,
        Mauro Rossi <issor.oruam@...il.com>,
        Michael Matz <matz@...e.de>,
        "Masahiro Yamada" <masahiroy@...nel.org>
Subject: RE: [PATCH] Documentation/changes: Raise minimum supported binutils
 version to 2.23

From: Jason A. Donenfeld
> Sent: 23 March 2020 21:12
...
> By the way, while we're in the process of updating dependencies, what
> if we ratched the minimum binutils on x86 up to 2.25 (which is still
> quite old)? In this case, we could get rid of *all* of the CONFIG_AS_*
> ifdefs throughout.

Even my system has 2.23.2, although I've had to pull in a later
version of old of the elf libraries at some point.

Unfortunately we have to support customers who insist on using
very old distributions - and it is easiest to build things on
systems with similar old userspace.
The memcpy/memmove fiasco and changes to C++ 'character traits'
make anything else almost impossible.

Unnecessary minimum versions do cause grief.

	David

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